A murdered woman's Fitbit data has been used by prosecutors in the US state of Connecticut as they press charges against her husband.

According to a police report obtained by the Hartford Courant, 40-year-old Richard Dabate has been arrested and charged on suspicion of the December 23, 2015 murder of his wife, Connie Dabate.

He has also been charged with tampering with physical evidence and providing a false statement about his 39-year-old wife's death.

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The pair shared a house in Ellington, Connecticut and had two children.

Richard Dabate was found tied to a chair at the family home by police officers responding to a 911 call.

He told investigators that a masked intruder broke into their home, attacked and threatened him, and then shot and killed Connie as she returned to the house after an exercise class at their local YMCA.

However, data from Connie's Fitbit is allegedly at odds with Richard's account, according to the police documents.

The last recorded movement on Connie Dabate's Fitbit was, according to the police report, approximately 1,217 feet between 9.18am and 10.05 am – around 10 times the distance between the victim's car and the basement, and an hour after Richard Dabate told investigators his wife had arrived home.

Richard Dabate is expected to enter a plea during his next court appearance on April 28.

His lawyer told the Courant: "My client is innocent of these charges and he looks forward to being vindicated after a trial."